diff --git a/configure.in b/configure.in
index 5e95c913..21d28de5 100644
--- a/configure.in
+++ b/configure.in
@@ -646,9 +646,10 @@ AC_PATH_PROG(PATH_TO_PS,ps)
 
 AC_MSG_CHECKING(for ps syntax)
 dnl For OpenBSD 3.2 & 3.3. Must come before ps -weo
+dnl Should also work for FreeBSD 5.2.1 and 5.3
 dnl  STAT UCOMM              VSZ   RSS USER      PPID COMMAND
 if ps -axwo 'stat comm vsz rss user uid ppid args' 2>/dev/null | \
-	egrep -i ["^ *STAT +UCOMM +VSZ +RSS +USER +UID +PPID +COMMAND"] > /dev/null
+	egrep -i ["^ *STAT +[UCOMAND]+ +VSZ +RSS +USER +UID +PPID +COMMAND"] > /dev/null
 then
 	ac_cv_ps_varlist="[procstat,&procuid,&procppid,&procvsz,&procrss,&procpcpu,procprog,&pos]"
 	ac_cv_ps_command="$PATH_TO_PS -axwo 'stat uid ppid vsz rss pcpu comm args'"